1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
-----------------------------------------------------------------------
Copyright: 2010-2015, iMinds-Vision Lab, University of Antwerp
2014-2015, CWI, Amsterdam
Contact: astra@uantwerpen.be
Website: http://sf.net/projects/astra-toolbox
This file is part of the ASTRA Toolbox.
The ASTRA Toolbox is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The ASTRA Toolbox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
-----------------------------------------------------------------------
$Id$
*/
#include "astra/Projector2D.h"
#include "astra/ParallelVecProjectionGeometry2D.h"
#include "astra/FanFlatProjectionGeometry2D.h"
#include "astra/FanFlatVecProjectionGeometry2D.h"
#include "astra/SparseMatrixProjectionGeometry2D.h"
#include "astra/SparseMatrix.h"
namespace astra
{
//----------------------------------------------------------------------------------------
// constructor
CProjector2D::CProjector2D() : configCheckData(0)
{
m_bIsInitialized = false;
}
//----------------------------------------------------------------------------------------
// constructor
CProjector2D::CProjector2D(CProjectionGeometry2D* _pProjectionGeometry, CVolumeGeometry2D* _pVolumeGeometry) : configCheckData(0)
{
m_pProjectionGeometry = _pProjectionGeometry->clone();
m_pVolumeGeometry = _pVolumeGeometry->clone();
m_bIsInitialized = true;
}
//----------------------------------------------------------------------------------------
// destructor
CProjector2D::~CProjector2D()
{
clear();
}
//---------------------------------------------------------------------------------------
// Clear - Constructors
void CProjector2D::_clear()
{
m_pProjectionGeometry = NULL;
m_pVolumeGeometry = NULL;
m_bIsInitialized = false;
}
//---------------------------------------------------------------------------------------
// Clear - Public
void CProjector2D::clear()
{
if (m_pProjectionGeometry) {
delete m_pProjectionGeometry;
m_pProjectionGeometry = NULL;
}
if (m_pVolumeGeometry) {
delete m_pVolumeGeometry;
m_pVolumeGeometry = NULL;
}
m_bIsInitialized = false;
}
//---------------------------------------------------------------------------------------
// Check
bool CProjector2D::_check()
{
// check pointers
ASTRA_CONFIG_CHECK(m_pProjectionGeometry, "Projector2D", "Invalid Projection Geometry Object.");
ASTRA_CONFIG_CHECK(m_pVolumeGeometry, "Projector2D", "Invalid Volume Geometry Object.");
// check initializations
ASTRA_CONFIG_CHECK(m_pProjectionGeometry->isInitialized(), "Projector2D", "Projection Geometry Object Not Initialized.");
ASTRA_CONFIG_CHECK(m_pVolumeGeometry->isInitialized(), "Projector2D", "Volume Geometry Object Not Initialized.");
// success
return true;
}
//---------------------------------------------------------------------------------------
// Initialize, use a Config object
bool CProjector2D::initialize(const Config& _cfg)
{
ASTRA_ASSERT(_cfg.self);
ConfigStackCheck<CProjector2D> CC("Projector2D", this, _cfg);
// if already initialized, clear first
if (m_bIsInitialized) {
clear();
}
// required: ProjectionGeometry
XMLNode* node = _cfg.self->getSingleNode("ProjectionGeometry");
ASTRA_CONFIG_CHECK(node, "Projector2D", "No ProjectionGeometry tag specified.");
// FIXME: Change how the base class is created. (This is duplicated
// in astra_mex_data2d.cpp.)
std::string type = node->getAttribute("type");
if (type == "sparse_matrix") {
m_pProjectionGeometry = new CSparseMatrixProjectionGeometry2D();
m_pProjectionGeometry->initialize(Config(node));
} else if (type == "fanflat") {
CFanFlatProjectionGeometry2D* pFanFlatProjectionGeometry = new CFanFlatProjectionGeometry2D();
pFanFlatProjectionGeometry->initialize(Config(node));
m_pProjectionGeometry = pFanFlatProjectionGeometry;
} else if (type == "fanflat_vec") {
CFanFlatVecProjectionGeometry2D* pFanFlatVecProjectionGeometry = new CFanFlatVecProjectionGeometry2D();
pFanFlatVecProjectionGeometry->initialize(Config(node));
m_pProjectionGeometry = pFanFlatVecProjectionGeometry;
} else if (type == "parallel_vec") {
CParallelVecProjectionGeometry2D* pParallelVecProjectionGeometry = new CParallelVecProjectionGeometry2D();
pParallelVecProjectionGeometry->initialize(Config(node));
m_pProjectionGeometry = pParallelVecProjectionGeometry;
} else {
m_pProjectionGeometry = new CParallelProjectionGeometry2D();
m_pProjectionGeometry->initialize(Config(node));
}
// "node" is deleted by the temp Config(node) objects
ASTRA_CONFIG_CHECK(m_pProjectionGeometry->isInitialized(), "Projector2D", "ProjectionGeometry not initialized.");
CC.markNodeParsed("ProjectionGeometry");
// required: VolumeGeometry
node = _cfg.self->getSingleNode("VolumeGeometry");
ASTRA_CONFIG_CHECK(node, "Projector2D", "No VolumeGeometry tag specified.");
m_pVolumeGeometry = new CVolumeGeometry2D();
m_pVolumeGeometry->initialize(Config(node));
// "node" is deleted by the temp Config(node) object
ASTRA_CONFIG_CHECK(m_pVolumeGeometry->isInitialized(), "Projector2D", "VolumeGeometry not initialized.");
CC.markNodeParsed("VolumeGeometry");
return true;
}
//----------------------------------------------------------------------------------------
// weights of each detector in a projection angle
void CProjector2D::computeProjectionRayWeights(int _iProjection, SPixelWeight* _pfWeightedPixels, int* _piRayStoredPixelCount)
{
int iPixelBufferSize = getProjectionWeightsCount(_iProjection);
int iDetector;
for(iDetector = m_pProjectionGeometry->getDetectorCount()-1; iDetector >= 0; --iDetector) {
computeSingleRayWeights(_iProjection, // projector index
iDetector, // detector index
&_pfWeightedPixels[iDetector*iPixelBufferSize], // pixel buffer
iPixelBufferSize, // pixel buffer size
_piRayStoredPixelCount[iDetector]); // stored pixel count
}
}
//----------------------------------------------------------------------------------------
// explicit projection matrix
CSparseMatrix* CProjector2D::getMatrix()
{
unsigned int iProjectionCount = m_pProjectionGeometry->getProjectionAngleCount();
unsigned int iDetectorCount = m_pProjectionGeometry->getDetectorCount();
unsigned int iRayCount = iProjectionCount * iDetectorCount;
unsigned int iVolumeSize = m_pVolumeGeometry->getGridTotCount();
unsigned long lSize = 0;
unsigned int iMaxRayLength = 0;
for (unsigned int i = 0; i < iProjectionCount; ++i) {
unsigned int iRayLength = getProjectionWeightsCount(i);
lSize += iDetectorCount * iRayLength;
if (iRayLength > iMaxRayLength)
iMaxRayLength = iRayLength;
}
CSparseMatrix* pMatrix = new CSparseMatrix(iRayCount, iVolumeSize, lSize);
if (!pMatrix || !pMatrix->isInitialized()) {
delete pMatrix;
return 0;
}
SPixelWeight* pEntries = new SPixelWeight[iMaxRayLength];
unsigned long lMatrixIndex = 0;
for (unsigned int iRay = 0; iRay < iRayCount; ++iRay) {
pMatrix->m_plRowStarts[iRay] = lMatrixIndex;
int iPixelCount;
int iProjIndex, iDetIndex;
m_pProjectionGeometry->indexToAngleDetectorIndex(iRay, iProjIndex, iDetIndex);
computeSingleRayWeights(iProjIndex, iDetIndex, pEntries, iMaxRayLength, iPixelCount);
for (int i = 0; i < iPixelCount; ++i) {
pMatrix->m_piColIndices[lMatrixIndex] = pEntries[i].m_iIndex;
pMatrix->m_pfValues[lMatrixIndex] = pEntries[i].m_fWeight;
++lMatrixIndex;
}
}
pMatrix->m_plRowStarts[iRayCount] = lMatrixIndex;
delete[] pEntries;
return pMatrix;
}
} // end namespace
|
